Thumbnail Image

Thesis

Browse

1995 - 199925
Reset filters
Subject: Agronomy × End date: 1999 × Start date: 1990 × Type: Thesis × Thesis Type: Ph.D ×
Reset filters

Search Results

Now showing 1 - 9 of 25
  • Thumbnail Image
    ThesisItemOpen Access
    LAND SUITABILITY EVALUATION OF MAJOR SUGARCANE GROWING SOILS OF KARNATAKA
    (University of Agricultural Sciences, Dharwad, 1999) NAIDU, L G K; HUNSIGI, GURURAJ
    ABSTRACT NOT AVAILABLE
  • Thumbnail Image
    ThesisItemOpen Access
    STUDIES ON WEED MANAGEMENT IN RAINFED CHILLI + COTTON INTERCROPPING SYSTEM
    (University of Agricultural Sciences, Dharwad, 1999) PATIL, M B; PATIL, V C
    A field experiment was conducted during 1991-92 and 1992-1993 under rainfed conditions at Main Research Station, University of Agricultural Sciences, Dharwad. In this experiment, the effect of weed management treatments on the growth, yield and quality of cotton (DCH-32) and chilli (Byadagi kaddi) under chilli + cotton intercropping system was studied. Randomized complete block design was adopted with four replications. Among different weed management treatments, higher weed density at all the stages of crop growth during both the years was observed with weedy check and pendimethalin + oxyfluorfen (tank mix). Owing to the season-long weed-free conditions, cent percent weed control efficiency (WCE) was recorded with weed-free check. The weed control efficiency showed an increased trend with two hand weeding + two hoeings (30, 60, 90 and 120 DAT) and oxyfluorfen (0.2 kg a.L ha'') followed by glyphosate (1.0 kg a.L ha'') up to 120 DAT and thereafter it declined. The WCE at 30 and 60 DAT was comparatively lower with pendimethalin or fluchloralin each at 1.0 kg a.L ha'' or oxyfluorfen at 0.1 kg a-L ha'' supplemented with OM hoeing and it was effectively brought up at 90 DAT due to hoeing at 75 DAT. The dry matter production and nutrient depletion by weeds also followed a similar trend. Number of weeds, dry matter production and uptake of nutrients by weeds were negatively correlated with chili and seed cotton yield. Significantly higher dry chilli yield was obtained from the plots which were kept weed-free through out the crop growth period (907 kg ha"') that received two hand weedings and two hoeings (870 kg ha') than in all other treatments except oxyfluorfen followed by glyphosate. Similarly, weed-free check plots that received multiple inter cultivation and hand weedings out yielded all other treatments in seed cotton yield. Seed cotton yield per ha obtained with two hand weedings and two hoeings (1284 kg ha') was on par with oxyfluorfen followed by glyphosate (1188 kg ha''). However, these treatments were superior to all other treatments in seed cotton yield. The increase in the dry chilli and seed cotton yield with oxyfluorfen followed by glyphosate or conventional method than other treatments may be ascribed to the increase in growth and yield attributing characters of both chilli and cotton due to effective control of weeds. Due to higher economic yield and market price of chilli and seed cotton, higher net income and benefit to cost ratio was obtained with weed-free check, two hand weedings + two hoeings and oxyfluorfen followed by glyphosate.
  • Thumbnail Image
    ThesisItemOpen Access
    INTEGRATED NUTRIENT MANAGEMENT FOR SUSTAINABLE PRODUCTION IN SOYBEAN BASED CROPPING SYSTEMS
    (University of Agricultural Sciences, Dharwad, 1999) H.B. Babalad; ITNAL, C J
    Field experiments were conducted Main Research Station, University of Agricultural Sciences, Dharwad during 1993-96 on integrated nutrient management for sustainable production in soybean-based production systems. The investigations comprised of use of crop residues (OR), cellulose degrading organism Phanerochaete chrysosporium (PC), vermicompost (V), vermiculture(VC) and FYM m combination with inorganic fertilizers in soybean + cotton and soybean-safflower cropping systems. The data over a period of 3 years revealed that the influence of crop residues in the first year was not appreciative. While, itsefficacy on crop growth was manifested conspicuously in the second year and reached a level of significance during third year. Incorporation of crop residues regardless of treatment had adverse effects on safflower performance when averaged over two years. Application of RDF + FYM recorded 17 and 11.7 percent higher yield of soybean and cotton kapas respectively over RDF alone with pooled analysis. Continuous application of FYM facilitated the reduction of fertilizer levels with on par productivity of the crop. Similarly, vermicompost with RDF and 50% RDF had a significantly appreciative influence on crop yields over their individual application. The economics of various cropping systems indicated that net returns were significantly higher (Rs. 30,950/ha) with intercropping of soybean + cotton over sequence cropping of soybean - safflower (Rs.25,502/ha). Incorporation of crop residues with and without PC recorded significantly higher net returns (Rs.29,710 and Rs.29,220/ha respectively) as compared no residue (Rs.25,750/ha). Among the manurial treatments, RDF + FYM and 50% RDF + FYM recorded significantly higher net returns (R3.33,430 and Rs.31,970/ha respectively) over rest of the manurial treatments and RDF. The combined application of crop residue, manures and their interactions exhibited significant improvement on organic carbon, available soil N, P and K and as well soil microflora. Similarly, physical properties of the soil such as aggregate stability and infiltration were also improved with integrated nutrient management practices.
  • Thumbnail Image
    ThesisItemOpen Access
    PERFORMANCE OF WHEAT (Triticum aestivum) AS INFLUENCED BY BUND PLANTED MULTI PURPOSE TREE SPECIES
    (University of Agricultural Science, Dharwad, 1999) Patil, Raveendra H; Itnal, C J
    ABSTRACT NOT AVAILABLE
  • Thumbnail Image
    ThesisItemOpen Access
    EFFECT OF FERTIGATION ON GROWTH, LEA F YIELD AND QUALITY OF MULBERRY AND ITS IMPACT ON SILKWORM LARVAL GROWTH, COCOON AND SILK QUALITY CHAR
    (University of Agricultural Science, Dharwad, 1997) SHIVA KUMAR, H . R; SHIVASHANKAR, K
    ABSTRACT NOT AVAILABLE
  • Thumbnail Image
    ThesisItemOpen Access
    EFFECT OF ORGANIC AND INORGANIC SOURCES OF NUTRIENTS ON FINGERIVIILLET BASED CROPPING SYSTEM
    (University of Agricultural Science, Dharwad, 1998) NANJUNDAPPA, G; Shivaraj, B
    ABSTRACT NOT AVAILABLE
  • Thumbnail Image
    ThesisItemOpen Access
    "AGRONOMIC INVESTIGATIONS ON INTEGRATED WEED MANAGEMENT IN TRANSPLANTED AND DRILL SOWN FINGER MILLET { E l e u s i n e c o r a c a n a Gaertn.)"
    (University of Agricultural Science, Dharwad, 1998) CHANNA NAlK, D; MUNIYAPPA, T V
    ABSTRACT NOT AVAILABLE
  • Thumbnail Image
    ThesisItemOpen Access
    "DELINEATION OF TWO SOIL SERIES OF KARNATAKA FOR NUTRIENT STATUS AND CROP RESPONSE TO MICRONUTRIENTS IN A CROPPING SYSTEM OF GROUNDNUT-MAIZE-SUNFLOWER"
    (University of Agricultural Science, Dharwad, 1995) PRAKASH, H R; SHIVASANKAR, K
    ABSTRACT NOT AVAILABLE
  • Thumbnail Image
    ThesisItemOpen Access